Lubricator for handsaws.



Patented July 13, 1909.

Balli i "v J1/we Mofo G. E. LOWE.

LUBRIGATQR EUR HANDSAWS.

APPLICATION FILED JAN. 7, 1909.

mumaw. a, GRAHAM co.. pHoro-umocmpnms. wnsumerou. i!V c.

f that is holding CHARLES EDWARD LOWE,

OF MCALESTER, OKLAHOMA, ASSIGNOR OF ONE-HALF TO WALTER CARL ELLIS, OF GUTHRIE, OKLAHOMA.

LUBRICATOR FOR HANDSAWS.

Specification of Letters Patent.

raten-ted July 1e, 190e.

Application filed January 7, 1909. Serial No. 471,065.

To all whom it may concern:

Be it known that l, CHARLES EDWARD Lowe, a citizen of the United States, and a resident p of McAlester, Pittsburg county, Oklahoma, have invented new and uselul Improvements in Lubricators for l-landsaws, ol which the :following is a lull, clear, and exact specification.

My invention relates to lubricators for hand saws, which are constructed to lit within chambers formed in the handles oi the saws, and is designed. to be operated to lubricate the saw blade while in the act oi' sawing, the workman using a finger of the same hand the saw to manipulate the lubricator. By placing the controlling means within the reach ol' the hand operating the saw, the blade can be oiled while the sawing is actually going on, and at the same time the workmans other hand is left free to hold in place the object he is sawing. Or, as is sometimes the case, the workman may :lind it necessaryT to use his i'ree hand to retain his position. upon a ladder, scafllold or other dangerous place.

Referring to the drawing forming part ol' this specilicationlligure 1 is the handle end of a saw equipped with my lubricator. Fig. 2 is an enlarged sectional iront view ol' the lubricator closed, taken through the plane x-:r of Fig. 3. A part oi the blade and handle is shown in dotted line. Fig. 3 is a sectional view taken through the plane i/-jz/ of Fig. 2, looking` toward the right, and showing the outlet valve open. Fig. 4L `is a view o1Ll the bottom ol' the lubricator showing a part of a saw blade in section.

The reservoir 1 for retaining the lubricant may be ol' any convenient shape, but to secure su'flicient space 'l'or the oil, without weakening` the handle when the chamber is cut therein, it is preferable to use a boX or can oi' rectangular formation, that is, long and. comparatively narrow. It comprises the top 2, the bottom 3, the two sides 4 and 5 and the two ends 6%(5. The sides and ends extend below the bottom and are soldered or otherwise secured to a :lacing plate 7. This plate is bent to conform to the shape ol the bottom of the saw handle 8 against which it snugly `fits and to which it is secured by screws 9 passed through holes 10 formed in the plate. A chamber 11 is formed in the handle of the saw ol su'llicient size to lreely admit the reservoir, and the screwing oi' the face plate upon the handle when the lubricater has been inserted in the chamber amply secures it in position, the lacing plate making a neat 'finish for the whole. The chamber .l1 may be drilled and chiseled ont from the blade end of the handle. The drill will lol,- low the slit in the handle into which the blade lits, and the chamber will thus be easily made true and symmetrical on each side oil the slit. A notch 12 is cut in the blade 13 to permit the blade to be inserted. in place alter the lubricator has been installed, and the usual screw l'astenings 141 are inserted at each side oi the lubrlcator to secure the blade and handle together.

The following` mechanism is employed to permit the flow of oil from the lubricator to the blade. The bottom of the reservoir is provided with a screwthreaded hole 15 into which is screwed the valve cylinder 16. The cylinder is hollow throughout its length, but the part extending into the reservoir has an interior 17 of a greater diameter than the interior 18 of the part extending below the reservoir, thus forming a shoulder positioned at the entrance to the reservoir, which a'lloi'ds a seat 19 for a cylindrical valve 20, which is inserted within the larger chamber. The valve is kept normally upon its seat by the spring 21, which is inserted within the chamber above the valve and is retained in a state of compression by the screw 22 screwed into the top of the chamber. The valve has a reduced portion or stem which extends into the lower bore of the cylinder. But it is preferable that the stem be made a separate piece 23 having a screwthreaded shank 24 screwed into a threaded hole 25 formed in the bottom olE the valve. In this way, a pliable washer 26 can be iirmly held between the valve and stem when the two are screwed tightly together, the washer causing` a tight closing ol the valve upon the seat. The part of the cylinder that extends below the reservoir is increased in outside diameter to form a shoulder 27 to make a tight connection of the cylinder with the reservoir and a washer 28 is inserted on the cylinder to insure a tight union. This lower end is provided with. a slot 29 to admit the saw blade and care must be taken that the washer be ol the proper thickness so that when the cylinder is screwed tight, the slot will have the proper direction to receive the blade, or if desirable, the slot may be formed after the cylinder has loo been screwed to the reservoir. The bottom of the cylinder extends through a hole in the face late7forashortdistance. Slots 30-30 are 'ormed in the ends of the reservoir and slot 31 is formed in the face plate, (or the face plate may be made in two parts) to admit the saw blade when the parts are assembled. The lower end of the valve stem also has a slot 32 which permits it to straddle the saw blade similar to the lower end of the cylinder; it moreover provides an opening for the passage of the oil, and to increase the opening another slot 33 is made at right angles to the first. The crossing of the two slots forms a hollow 34 for a suitable distance up the valve stem, which affords a good exit for the oil. Orifices 35, preferably four in number, are formed through the wall of the cylinder within the reservoir near the bottom thereof, and afford exits for the oil when the valve has been raised to proper position.

The raising of the valve is accomplished by the following mechanism 2-lloles 36 are formed in the top and bottom of the reservoir and a tube 37 soldered or otherwise secured therein, affording a passageway through the cylinder from to to bottom. A rod 33 is passed through this tube and extends for a suitable distance above and be low the reservoir, and a hole 39 is made in the saw handle to permit the rod to extend to the hand hole 40. Upon the end of the rod is pinned the head 41, preferably formed of a circular top 42 and a socket 43 below to receive the rod. The top is extended at one side to form the lifting lip 44. The entire head fits into a cavity made in the wood of the handle to bring the top fiush with the hand hole 40. The handle of the saw is cut out below the lifting lip to form the clearance space 45 to enable the workman to place his finger below the lip previous to lifting it. The lower end of the rod 38 extends for a suitable distance below the reservoir and through an opening 46 formed in the facing plate. The tube 37 is placed a little to one side of the longitudinal center of the reservoir to enable it to escape the saw blade, as shown in Figs. 3 and 4. Near the bottom of the rod an arm 47 is secured at right angles thereto and extends into a slot 48 (an enlargement of the slot 31) formed in the lower portion of the cylinder. To bring the arm in proper position in this slot, it is given a slight offset 49 (Fig. 4) and the face plate is accordingly cut out as at 50 to accommodate it. The arm rests upon the end of a screw 51 screwed through the cylinder and coacts with the valve stein on one side thereof when the rod is lifted. A hole 52 is formed in the side of the reservoir for refilling it which is closed by a screw 53, a pliable washer 54 being also used to effect a tight closing by the screw. To insure sufficient thread for the engagement of the screw, a

flanged collar 55 is secured on the inside of the reservoir.

The entire reservoir may be made of sheet metal if desired7 but in any instance it is preferable that the side having the hole for refilling be made resilient, similar t0 the bottom of an ordinary oil can. The side can then be forced in by pressing the head of the screw 53 which should be sufficiently large to extend through a hole 56 made in the side of the saw handle. When the oil is thick, or when the outlet becomes clogged, pressing the side in will materially aid in forcing the oil out.

The assembling and o eration of my lubricator are briefiy as fol ows: The reservoir, tube 37 and face plate are referably made rigid (that is, undetachab e.) The valve stem and valve are screwed tightly together, the washer first being inserted between them they are then placed in the cylinder from the top, care being taken that one of the slots in the stem is in alinemeiit with the slot in the lower end of the cylinder, the spring is next inserted in the cylinder, and the top 22 screwed in. The cylinder is then screwed to the bottom of the reservoir, a washer being used to make a tight joint, care being taken that when the cylinder is tight, the slot is in proper direction to receive the saw blade. The lifting rod 38 is inserted in place from the bottom of the reservoir and the screw 51 screwed in to hold it. The lubricator may then be placed in the chamber of the saw handle, the rod lifted and the head piece 41 pinned to the rod. The saw blade is then inserted and screwed to the handle. The lubrioator can then be filled and the plug 53 with its washer screwed in.

To operate the lubricator, it is only necessary for the workman to place the first finger under the lip 44 and raise it. This may be done while the sawing is actually going on. It is the practice in sawing to keep the first finger on the side of the handle to steady or guide it while the other fingers and thumb grip the handle; for this reason it is advisable to put the lip 44-on the side where the finger is lplaced, and for the same reason it is preferab e to have the push screw on that side. When the rod is raised, the arm 47 coacts with the valve stem and raises the valve to the position shown in Fig. 3, that is, above the orifices 35 at the same time the slotted portions of the stem enter the chamber 17. The oil then flows into the chamber through the orifices 35, down the slots 32-33 in the stein, down the bore 13 of the cylinder. Here it comes in contact with the blade, upon that portion thereof that is centrally located in the bore, and then flows down the blade, and is distributed over its surface in the process of sawing, by aid of the wood being sawed. The direction of flow is shown by the dotted arrow in Fig. 3, illustrating the flow of oil through one of the orifices. As soon as the finger is released from the lip the spring 21 reacts and quickly stops the flow, so that when the saw has been sufficiently oiled, the flow can be instantly stopped and prevent any unnecessary waste. The groove 32 should be of' sufficient depth to permit the arm 47 to raise the valve stem the required height, but not to raise it sufficiently to free it from its straddled position on the saw blade, otherwise it might become slightly rotated in its raised position, and rest upon the cut edge of the saw blade instead of coming down to its normal position to shut off the flow ofthe oil when released.

Having thus described my invention I 'claim-n l. A lubricator for a hand saw adapted to fit within a chamber formed in the handle, comprising a reservoir, oil exit orifices, a valve to open and close the orifices, controlling means for raising the valve to open the oriL fices comprising a bar extending below the reservoir and a lug extending from said. bar and adapted to coact with the bottom of the valve to force it upward, the said bar having its upper end above the reservoir in position to be raised by the hand operating the saw while sawing, and automatic means for lowering the valve to close the orifices.

2. A lubricator for a hand saw adapted to fit Within a chamber formed in the handle comprising a reservoir, oil exit orifices, a valve to open and close the orifices, controlling means for raising the valve to open the orifices comprising a bar extending below the reservoir and adapted to force the valve upward from the bottom, the said bar being separated from the interior of the reservoir and having its u per end above the reservoir in position to lie raised by the hand operating the saw while sawing, and automatic means for lowering the valve to close the orifices.

3. A lubricator for a hand saw adapted to fit within a chamber formed in the handle comprising a reservoir, a passageway through the reservoir from top to bottom, oil exit orifices, a valve to open and close the orifices, controlling means for raising the valve to open the orifices comprising a bar extending through the said passageway, one end being below the reservoir and adapted to force the valve upward from the bottom, the other end above the reservoir in position to be raised by the hand operating the saw while sawing and automatic means for lowering the valve to close the orifices.

4. A lubricator for a hand saw adapted to fit within a chamber formed in the handle, comprising a reservoir, a tube extending through the reservoir forming a passageway from top to bottom, a valve cylinder extending into the reservoir through the bottom, oil exit orifices in the cylinder wall, a cylindrical valve Within the cylinder to open and close the orifices, a spring pressing down upon the valve to automatically close the orifices, a bar extending through the said passageway, one end being below the reservoir, an arm extending from said end to coact with the bottom of the valve to force it upward, the other end of the rod being above the reservoir in position to be raised by the hand operating the saw while sawing,

5. A lubricator for a hand saw ada )ted to fit within a chamber' formed in the iandle comprising a reservoir, a hole in the side thereof' for refilling it, a screw to close the hole, a tube extending through the reservoir forming a passageway from top to bottom, a valve cylinder screwed through the bottom ol the reservoir, and extending part way into the reservoir, the part extending therein having a larger bore than the part extending below, oil exit orifices in the cylinder wall within the reservoir near the bottom thereof, a cylindrical valve within the larger bore of the cylinder to open and close the orifices, a stem extending from the bottom of the valve into the smaller cylinder bore, a spring compressed between the head of the cylinder and top of the valve to close the orifices, a bar extending through the said passageway, one end being below the reservoir, an arm cx tending from said end to coact with the bottom of the valve to force it upward, the other end of the rod being above the reservoir in position to be raised by the hand opcrating the saw while sawing.

6. A lubricator for a handv saw adapted to fit within a chamber formed in the handle, comprising a reservoir having sides and ends extending below the bottom, a face plate bent to conform to the handle formed on the ends of the said side and end extensions to be screwed to the handle to secure the reservoir in position and to cover the chamber in the handle, a slot extending longitudinally of the face plate to admit the saw blade, at least one side of the reservoir made flexible, a screwthreaded hole in the fiexible side to refill the reservoir, a large headed screw to close the hole, the head thereof adapted to extend through a hole in the saw handle to act as a push button to force the flexible side in to secure a iiow of oil, a tube extending through the reservoir to one side of the saw blade forming a passageway from top to bottom, a valve cylinder screwed. through the bottom of the reservoir and extending part way in the reservoir, the part extending therein having a larger bore than the part extending below, the part extending below being slotted to admit the saw blade and extending for a short distance below the face plate through a hole formed therein, a screw plug to close the top of the cylinder, oil exit orifices in the cylinder wall within the reservoir near the bottom thereof, a cylindrical stein oi the valve on one side to force the valve within the larger bore of the cylinder to open and close the orifices, a stein extendingl from the bottom of the valve into the smaller cylinder bore, slots formed in the bottoni ol the stein to afford an eXit for the oil to the blade, one of said slots positioned to admit the blade, a spring compressed between the screw plug' and top of the valve to close the oriiices, a bar extendingl through the said passageway in the reservoir, one end being below the reservoir and extending through a hole in the face plate, an arm eX- y tending` from said end into a slot formed in the bottom of the cylinder to coact with the valve upward, a screw screwed. through tho bottom of the cylinder having its end projecting below the arm to afford a support for the arm, the other end ol the rod being` above the reservoir, and adapted to extend into the handv hole of the saw handle in position to be raised by the hand operating` the Saw, a head for the rod positioned to set in a cavity of the handle, havingl its top flush with the hand hole, and a lip extending from the head to the side oi the handle which is cut away be low the lip to facilitate a lifting of the lip to open the oil orifices.

CHARLES EDVARD LOVE. lVitnesse/s FRANK SMiTH, C. J. SAMPLE. 

